<template>
  <view>
    <!-- 使用自定义的搜索组件 -->
    <!-- 自定义搜索栏 -->
    <!-- <my-search :bgcolor="''" :radius=""></my-search> -->
    <my-search @myClick="gotoSearch"></my-search>

    <view class="scroll-view-container">

      <!-- 左侧的滑动区域 -->
      <scroll-view class="left-scroll-view" scroll-y="true" :style="{height:wh + 'px'}">
        <view>
          <block v-for="(item,i) in cateList" :key="i">
            <view :class="['left-scroll-view-item', i === active ? 'active' : '']" @click="activeChanged(i)">
              {{item.cat_name}}
            </view>
          </block>
        </view>
      </scroll-view>
      <!-- 右侧的滑动区域 -->
      <scroll-view scroll-y="true" :style="{height:wh + 'px'}" :scroll-top="scrollTop">
        <view class="cate-Lv2" v-for="(item2,i2) in cateLevel2" :key="i2">
          <!-- 二级分类的标题 -->
          <view class="cate-Lv2-title">
            /{{item2.cat_name}}/
          </view>
          <!-- 当前二级分类下的三级分类列表 -->
          <view class="cate-lv3-list">
            <!-- 三级分类的item项 -->
            <view class="cate-lv3-item" v-for="(item3,i3) in item2.children" :key="i3" @click="gotoGoodsList(item3)">
              <!-- 三级分类的图片 -->
              <image :src="item3.cat_icon.replace('dev','web')"></image>
              <!-- 三级分类的文本 -->
              <text>{{item3.cat_name}}</text>
            </view>
          </view>
        </view>
      </scroll-view>
    </view>
  </view>
</template>

<script>
  // 导入自己封装的 mixin 模块
  import badgeMix from '@/mixins/tabbar-bardge.js'

  export default {

    // 将 badgeMix 混入到当前的页面中进行使用
    mixins: [badgeMix],
    data() {
      return {
        //当前设备可用的高度
        wh: 0,
        cateList: [],
        active: 0,
        //二级分类列表
        cateLevel2: [],
        scrollTop: 0
      };
    },

    onLoad() {
      const sysInfo = uni.getSystemInfoSync()
      console.log(sysInfo)
      this.wh = sysInfo.windowHeight - 50

      this.getCateList()
    },

    methods: {
      //获取分类列表的数据
      async getCateList() {
        const {
          data: res
        } = await uni.$http.get('/api/public/v1/categories')
        if (res.meta.status !== 200) return uni.$showMsg()
        this.cateList = res.message


        //为二级分类赋值
        this.cateLevel2 = res.message[0].children
      },


      activeChanged(i) {
        this.active = i

        //重新为二级分类赋值
        this.cateLevel2 = this.cateList[i].children

        this.scrollTop = this.scrollTop === 0 ? 1 : 0
      },

      //跳转到商品列表页面
      gotoGoodsList(item) {
        uni.navigateTo({
          url: '/subpkg/goods_list/goods_list?cid=' + item.cat_id
        })
      },

      //搜索栏跳转
      gotoSearch() {
        console.log('gotoSearch')
        uni.navigateTo({
          url: '/subpkg/search/search'
        })
      },
    }
  }
</script>

<style lang="scss">
  .scroll-view-container {
    display: flex;

    .left-scroll-view {
      width: 120px;

      .left-scroll-view-item {
        background-color: #f7f7f7;
        line-height: 60px;
        text-align: center;
        font-size: 12px;

        &.active {
          background-color: #fff;
          position: relative;

          &::before {
            content: ' ';
            display: block;
            width: 3px;
            height: 30px;
            background-color: #c00000;
            position: absolute;
            top: 50%;
            left: 0%;
            transform: translateY(-50%);
          }
        }
      }
    }
  }

  .cate-Lv2-title {
    font-size: 12px;
    font-weight: bold;
    text-align: center;
    padding: 15px 0;
    background-color: #fff;
  }

  .cate-lv3-list {
    display: flex;
    flex-wrap: wrap;
    background-color: #fff;

    .cate-lv3-item {
      width: 33.33%;
      display: flex;
      flex-direction: column;
      justify-content: center;
      align-items: center;
      margin-bottom: 10px;

      image {
        width: 60px;
        height: 60px;
      }

      text {
        font-size: 12px;
      }
    }
  }
</style>